package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    //微信服务地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private SetmealMapper setmealMapper;

    public User wxLogin(UserLoginDTO userLoginDTO) {
        //判断openid是否为空，如果为空表示登录失败，抛出业务异常

        String openId = getOpenId(userLoginDTO.getCode());
        if(openId == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断是否为新用户
       User user = userMapper.getByOpenid(openId);

        //如果是新用户，自动完成注册
        if(user == null) {
            user = User.builder()
                    .openid(openId)
                    .createTime(LocalDateTime.now())
                    .build();

            userMapper.insert(user);
        }

        //返回这个用户
        return user;
    }

    private String getOpenId(String code) {
        Map<String, String> map = new HashMap<String, String>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("grant_type","authorization_code");
        map.put("js_code",code);
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openId = jsonObject.getString("openid");

        return openId;
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
}
